Window-lock and burglar-alarm



(No Model.)

W. G. BENNETT.

WINDOW LOOK AND BURGLAR ALARM; No. 344,807. Patented July, 6, 1886.

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WINDOW-LUCK AND BURGLAR -ALARM.

SPECIFICATION forming part of Letters Patent No. 344,807. d y 1356= Application filed March 20,1886.

To all whom it may concern.-

Be it known that I, WVILLIAM GORDON BEN- NETT, a citizen of the United States, residing at Sharpsburg, in the county of Allegheny and State of Pennsylvania, have invented certainnew and useful Improvements in Oombincd Window-Lock and Burglar-Alarm; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being bad to the accompanying drawings, which form a part of this specification.

My invention relates to an improvement in combined window-locks and burglar-alarms,

the object being to provide a lock for windows that will give an alarm to the inmates of the house should the window to which it is attached be raised or otherwise disturbed; and with this end in view my invention consistsin certain details of construction and combination of parts, as will be more fully set forth hereinafter.

In the accompanying drawings Figure 1 is a sectional plan view of my improved combined window lock and burglar alarm constructed in accordance with my invention. Fig. 2 is an end elevation of the same, showing the manner of attachment with the sashes of a window. Fig. 3 is an exterior plan view.

To put my invention into practice,I pro vide a rectangular metallic shell, (1, of suitable size and form of construction, and pivot therein alever, I), having a circular opening, 0, in one end for holding a cap or cartridge, d. The other end of this lever I), I loosely pivot to the shell a and form therein a square opening, 6, into which a key may be inserted from the outside of the lock, and thelever b revolved toward the front and caught in a depression, f, formed at the end of the slot 9 in the side of the shell a. The lever b is held in that position by a bar, it, as will be more fully described hereinafter.

To the pivotal end of the lever b, I attach a stiff flat spring, i, the other end of which rests in a notch,j, formed in the side wall of the shell a.

On an extension, k, from the side wall of the shell a, I form a small projection, 2, within reach of the circular opening 0 of the lever b, in which the cap or cartridge (2 is placed.

At one end of the lock I secure an eccen- Serial No. 196,033. (No model.)

trie bar, h, having formed on its enlarged end a number of sharp angular teeth or projections; or a strip of rubber secured to the bar h may be used, if desired, in place of the an gular projections m. This eccentric lever or bar It, in conjunction with a bolt, 19, operated by a countersunk knob, q, and spriugr, locks the two sash o .9 together. This eccentric bar It also confines the lever b, holding the cap or cartridge d in the depression f, formed in the end of the lock.

The operation is as followszl The cap or cartridge d is first placed in the opening 0 in the end of the lever b. A square pointed key is placed in the opening 6 at the pivotal end of the lever b, and the same is revolved back until caught in the depression f in the shell a. The boltp is pushed back by means of the countersunk handle q, and the eccentric bar h drawn down until it rests on the lever b, which operation secures the same. The belt p is now allowed to project from the end of the lock. The pressure of the eccentric bar it against or under the sash is sufficient to hold the bar It and lever 11 in this position. The window is now locked and the alarm set. Should the sash s be raised or the upper sash lowered from the outside, there is sufficient space between the bottonr; or under side of the bolt 19 and the top of the bar 7L to release the lever 1) from the, depression f, which, actuated by the spring t, brings the cartridge d in contact with the projection Z and explodes the same, thus giving an alarm. The bar it, resting against the boltp, still keeps the window locked.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

In a combined window-lock and burglaralarm, the combination consisting of the shell a, the pivoted lever b, having an opening or receptacle, 0, formed in one end, in which a cap or cartridge, (1, may be placed, a spring, 1', attached to one end of the lever b, and in a notch, j, in the side wall of the shell to, the boltp, and eccentric bar h, for locking the window, substantially as and for the purpose described.

WILLIAM GORDON BENNETT.

Witnesses:

W. O. BARR, M. E. HARRISON. 

